High-pressure centrifugal blower

Abstract

Disclosed is a high-pressure centrifugal blower, which comprises an impeller with a back plate and pressure leveling blades secured to the back side of that back plate. The blades extend from the periphery of the impeller over some distance radially inwards. In order to regulate the pressure control clearance between the blades and the back wall of the blower case, control members have been installed between the blades and the back wall of the case.

What is claimed is: 
     
       1. A high-pressure centrifugal blower, including an impeller, a back plate of said impeller, pressure leveling blades secured to the back side of said back plate and extending from the periphery of the impeller over some distance radially inwards, a blower case around said impeller, and control means for regulating the pressure control clearance between said blades and the back wall of said case, said control means comprising control ring means installed on said back wall of said case between said blades and said back wall supported by regulating screw means secured to said back wall of said blower case. 
     
     
       2. A centrifugal blower according to claim 1, wherein said control ring means comprise a control ring in alignment with said blades, said regulating screw means comprising regulating screws secured to said back wall of said blower case supporting said control ring. 
     
     
       3. A centrifugal blower according to claim 1, wherein said control ring means comprise a control ring in alignment with said blade, said regulating screw means comprising regulating screws secured to said back wall of said blower case supporting said control ring, said control means further comprising a diaphragm of elastic material attached to said back wall of said blower case, said control ring being guided by said diaphragm.